samira-t/akka — comment on commit 1fc202eb1efa9deb6c39741966c52e2309e5def9
File: akka-setack/src/main/scala/akka/setack/core/TestMessageInvocation.scala line 82
By viktorklang:

I'd suggest:

override def toString(): String = "(" + sender + "," + receiver + "," + (if (message != null) message else messagePattern) + ")"